M. Leitner, G. Raidl:
"A lagrangian decomposition based heuristic for capacitated connected facility location";
Talk: Metaheuristic International Conference (MIC), Hamburg; 2009-07-13; in: "Proceedings of the 8th Metaheuristic International Conference (MIC 2009)", (2009).
http://publik.tuwien.ac.at/files/PubDat_176840.pdf